marvell: drivers: Add address decoding units drivers

Add address decoding unit drivers for Marvell SoCs.

Address decoding flow and address translation units chart
are located at docs/marvell/misc/mvebu-a8k-addr-map.txt

Change-Id: Id6ce311fa1f4f112df3adfac5d20449f495f71ed
Signed-off-by: Hanna Hawa <hannah@marvell.com>
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>

1 files changed, 195 insertions, 0 deletions

diff --git a/drivers/marvell/iob.c b/drivers/marvell/iob.c
new file mode 100644
index 000000000..9f9d04797
--- /dev/null
+++ b/drivers/marvell/iob.c
@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2016 - 2018 Marvell International Ltd.
+ *
+ * SPDX-License-Identifier:     BSD-3-Clause
+ * https://spdx.org/licenses
+ */
+
+/* IOW unit device driver for Marvell CP110 and CP115 SoCs */
+
+#include <a8k_common.h>
+#include <arch_helpers.h>
+#include <debug.h>
+#include <iob.h>
+#include <mmio.h>
+#include <mvebu.h>
+#include <mvebu_def.h>
+
+#if LOG_LEVEL >= LOG_LEVEL_INFO
+#define DEBUG_ADDR_MAP
+#endif
+
+#define MVEBU_IOB_OFFSET		(0x190000)
+#define MVEBU_IOB_MAX_WINS		16
+
+/* common defines */
+#define WIN_ENABLE_BIT			(0x1)
+/* Physical address of the base of the window = {AddrLow[19:0],20`h0} */
+#define ADDRESS_SHIFT			(20 - 4)
+#define ADDRESS_MASK			(0xFFFFFFF0)
+#define IOB_WIN_ALIGNMENT		(0x100000)
+
+/* IOB registers */
+#define IOB_WIN_CR_OFFSET(win)		(iob_base + 0x0 + (0x20 * win))
+#define IOB_TARGET_ID_OFFSET		(8)
+#define IOB_TARGET_ID_MASK		(0xF)
+
+#define IOB_WIN_SCR_OFFSET(win)		(iob_base + 0x4 + (0x20 * win))
+#define IOB_WIN_ENA_CTRL_WRITE_SECURE	(0x1)
+#define IOB_WIN_ENA_CTRL_READ_SECURE	(0x2)
+#define IOB_WIN_ENA_WRITE_SECURE	(0x4)
+#define IOB_WIN_ENA_READ_SECURE		(0x8)
+
+#define IOB_WIN_ALR_OFFSET(win)		(iob_base + 0x8 + (0x20 * win))
+#define IOB_WIN_AHR_OFFSET(win)		(iob_base + 0xC + (0x20 * win))
+
+uintptr_t iob_base;
+
+static void iob_win_check(struct addr_map_win *win, uint32_t win_num)
+{
+	/* check if address is aligned to the size */
+	if (IS_NOT_ALIGN(win->base_addr, IOB_WIN_ALIGNMENT)) {
+		win->base_addr = ALIGN_UP(win->base_addr, IOB_WIN_ALIGNMENT);
+		ERROR("Window %d: base address unaligned to 0x%x\n",
+		      win_num, IOB_WIN_ALIGNMENT);
+		tf_printf("Align up the base address to 0x%llx\n",
+			  win->base_addr);
+	}
+
+	/* size parameter validity check */
+	if (IS_NOT_ALIGN(win->win_size, IOB_WIN_ALIGNMENT)) {
+		win->win_size = ALIGN_UP(win->win_size, IOB_WIN_ALIGNMENT);
+		ERROR("Window %d: window size unaligned to 0x%x\n", win_num,
+		      IOB_WIN_ALIGNMENT);
+		tf_printf("Aligning size to 0x%llx\n", win->win_size);
+	}
+}
+
+static void iob_enable_win(struct addr_map_win *win, uint32_t win_id)
+{
+	uint32_t iob_win_reg;
+	uint32_t alr, ahr;
+	uint64_t end_addr;
+
+	end_addr = (win->base_addr + win->win_size - 1);
+	alr = (uint32_t)((win->base_addr >> ADDRESS_SHIFT) & ADDRESS_MASK);
+	ahr = (uint32_t)((end_addr >> ADDRESS_SHIFT) & ADDRESS_MASK);
+
+	mmio_write_32(IOB_WIN_ALR_OFFSET(win_id), alr);
+	mmio_write_32(IOB_WIN_AHR_OFFSET(win_id), ahr);
+
+	iob_win_reg = WIN_ENABLE_BIT;
+	iob_win_reg |= (win->target_id & IOB_TARGET_ID_MASK)
+		       << IOB_TARGET_ID_OFFSET;
+	mmio_write_32(IOB_WIN_CR_OFFSET(win_id), iob_win_reg);
+
+}
+
+#ifdef DEBUG_ADDR_MAP
+static void dump_iob(void)
+{
+	uint32_t win_id, win_cr, alr, ahr;
+	uint8_t target_id;
+	uint64_t start, end;
+	char *iob_target_name[IOB_MAX_TID] = {
+		"CFG  ", "MCI0 ", "PEX1 ", "PEX2 ",
+		"PEX0 ", "NAND ", "RUNIT", "MCI1 " };
+
+	/* Dump all IOB windows */
+	tf_printf("bank  id target  start              end\n");
+	tf_printf("----------------------------------------------------\n");
+	for (win_id = 0; win_id < MVEBU_IOB_MAX_WINS; win_id++) {
+		win_cr = mmio_read_32(IOB_WIN_CR_OFFSET(win_id));
+		if (win_cr & WIN_ENABLE_BIT) {
+			target_id = (win_cr >> IOB_TARGET_ID_OFFSET) &
+				     IOB_TARGET_ID_MASK;
+			alr = mmio_read_32(IOB_WIN_ALR_OFFSET(win_id));
+			start = ((uint64_t)alr << ADDRESS_SHIFT);
+			if (win_id != 0) {
+				ahr = mmio_read_32(IOB_WIN_AHR_OFFSET(win_id));
+				end = (((uint64_t)ahr + 0x10) << ADDRESS_SHIFT);
+			} else {
+				/* Window #0 size is hardcoded to 16MB, as it's
+				 * reserved for CP configuration space.
+				 */
+				end = start + (16 << 20);
+			}
+			tf_printf("iob   %02d %s   0x%016llx 0x%016llx\n",
+				  win_id, iob_target_name[target_id],
+				  start, end);
+		}
+	}
+}
+#endif
+
+void iob_cfg_space_update(int ap_idx, int cp_idx, uintptr_t base,
+			  uintptr_t new_base)
+{
+	debug_enter();
+
+	iob_base = base + MVEBU_IOB_OFFSET;
+
+	NOTICE("Change the base address of AP%d-CP%d to %lx\n",
+	       ap_idx, cp_idx, new_base);
+	mmio_write_32(IOB_WIN_ALR_OFFSET(0), new_base >> ADDRESS_SHIFT);
+
+	iob_base = new_base + MVEBU_IOB_OFFSET;
+
+	/* Make sure the address was configured by the CPU before
+	 * any possible access to the CP.
+	 */
+	dsb();
+
+	debug_exit();
+}
+
+int init_iob(uintptr_t base)
+{
+	struct addr_map_win *win;
+	uint32_t win_id, win_reg;
+	uint32_t win_count;
+
+	INFO("Initializing IOB Address decoding\n");
+
+	/* Get the base address of the address decoding MBUS */
+	iob_base = base + MVEBU_IOB_OFFSET;
+
+	/* Get the array of the windows and fill the map data */
+	marvell_get_iob_memory_map(&win, &win_count, base);
+	if (win_count <= 0) {
+		INFO("no windows configurations found\n");
+		return 0;
+	} else if (win_count > (MVEBU_IOB_MAX_WINS - 1)) {
+		ERROR("IOB mem map array > than max available windows (%d)\n",
+		      MVEBU_IOB_MAX_WINS);
+		win_count = MVEBU_IOB_MAX_WINS;
+	}
+
+	/* disable all IOB windows, start from win_id = 1
+	 * because can't disable internal register window
+	 */
+	for (win_id = 1; win_id < MVEBU_IOB_MAX_WINS; win_id++) {
+		win_reg = mmio_read_32(IOB_WIN_CR_OFFSET(win_id));
+		win_reg &= ~WIN_ENABLE_BIT;
+		mmio_write_32(IOB_WIN_CR_OFFSET(win_id), win_reg);
+
+		win_reg = ~IOB_WIN_ENA_CTRL_WRITE_SECURE;
+		win_reg &= ~IOB_WIN_ENA_CTRL_READ_SECURE;
+		win_reg &= ~IOB_WIN_ENA_WRITE_SECURE;
+		win_reg &= ~IOB_WIN_ENA_READ_SECURE;
+		mmio_write_32(IOB_WIN_SCR_OFFSET(win_id), win_reg);
+	}
+
+	for (win_id = 1; win_id < win_count + 1; win_id++, win++) {
+		iob_win_check(win, win_id);
+		iob_enable_win(win, win_id);
+	}
+
+#ifdef DEBUG_ADDR_MAP
+	dump_iob();
+#endif
+
+	INFO("Done IOB Address decoding Initializing\n");
+
+	return 0;
+}